User manual RUSSOUND TBL-75

[. . . ] The application of the TBL-75 is to adjust the volume of the connected speakers. The TBL-75 adjusts the volume of the speakers connected to it by adjusting the signal from the amplifier to the speakers. All Russound volume controls are manufactured using a high-quality autoformer design. Autoformers provide excellent frequency response and efficient use of amplifier power. [. . . ] For example, a pair of 4 speakers can be considered 2 pair of 8 speakers. By dividing the impedance of the speakers (step #2) by the number of pairs of speakers (step #3), you can determine the system impedance. Determine the proper impedance-matching setting by dividing the amplifier impedance (step 1) by the system impedance (step 4). Note: if the resulting number is between 2 and 4, use X4; if it 3 is between 4 and 8, use X8; if it is greater than 8, reduce the number of pairs of speakers. EXAMPLE: 8 amplifier impedance ÷ 3 system impedance = 2. 7 impedance-matching switch setting. X1 setting: Use this setting only when the TBL-75 volume control is used with an impedance-matching speaker selector. The X2, X4 and X8 settings are used when you are not using an impedancematching selector. Now that you have determined the proper switch settings, set all the volume controls in the system to the same setting (see diagrams opposite). IMPORTANT: If you are unsure of any of the installation procedures, the TBL-75 volume control should be installed by a professional custom installer. Strip 1/8" of insulation from the ends of all the wires that will be connected to the TBL-75 volume control. If necessary twist or solder the ends to keep from fraying and shorting to the other wires. Connect the leads from the amplifier or speaker selector to the connector labeled "input". The wires should stay consistent, left+ of the amplifier to the left+ input of the volume control, observing polarity and identification. As outlined in step #2, connect the speaker wires to the connector labeled "output". Make sure the amplifier or receiver is OFF and set the volume to minimum. If you are using a Russound speaker selector system, locate the On / Off button which corresponds to the speaker pair you wish to play. Turn on the amplifier or receiver and select a source such as a CD player. 4 L+ L- INPUT R- R+ Newmarket, NH U. S. A. X1 X2 X8 X4 L+ L- OUTPUT R- R+ MADE IN KOREA 5. Slowly turn up the amplifier or receiver volume and set it to a comfortable listening level. If the sound becomes distorted, you have reached the limit of the amplifier's volume capability and you should quickly reduce the volume to avoid damaging the amplifier. Adjust the volume of the speakers to the desired listening level using the TBL-75 volume control. [. . . ] Except to the extent prohibited by applicable law, no other warranties, whether expressed or implied, other than the express warranties stated herein, shall apply to units sold to the purchaser. Russound shall not be liable for any implied warranty of merchantability or fitness for a particular purpose to any person other than the original purchaser and user. Under no circumstances shall Russound be liable for property damage, economic loss or any consequential damages sustained in connection with the purchase and use of its products. Some states do not allow limitations on how long an implied warranty lasts, or do not allow the exclusion or limitation of incidental or consequential damages, so the above limitations or exclusions may not apply to you. [. . . ]